Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia

Hari Prasad Dasari, Jun Sung Ahn, Kiyong Ahn, Sun Young Park, Jongsup Hong, Hyoungchul Kim, Kyung Joong Yoon, Ji Won Son, Hae Weon Lee, Jong Ho Lee

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Abstract

In this work, the effect of ceria addition on the phase formations, sinterability and electrical conductivity of 10 mol.% scandia stabilized zirconia (SSZ) is investigated. Ceria co-doped SSZ (SSZ-xCeO2 (x = 0.5, 1.0, 5.0 mol.%)) powders were successfully synthesized by glycine-nitrate process and the electrical conductivity was measured in the temperature range of 600-900 °C. Fourier-transform infrared spectroscopy (FT-IR) analysis showed that the samples sintered at 1300 °C/3 h are free from impurities such as un-decomposed nitrates, residual water and nitrile intermediates. From the X-ray diffraction (XRD) analysis, the sintered samples results revealed that the presence of cubic and rhombohedral β-phases and Raman spectroscopy analysis further revealed the presence and monoclinic and tetragonal phases. From the linear shrinkage spectra, a linear shrinkage of 27% was observed at 1300 °C for SSZ and was decreased with the increase of cerium oxide content. The electrical conductivity has been decreased with the increase of ceria content and the SSZ-0.5CeO2 sample displayed a higher electrical conductivity compared to others indicating that as small as 0.5 mol.% CeO2 doping in SSZ is enough to ensure good conductivity results for its potential application as an electrolyte material in intermediate-temperature solid oxide fuel cells (IT-SOFCs).

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalSolid State Ionics
Volume263
DOIs
Publication statusPublished - 2014 Oct 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Dasari, H. P., Ahn, J. S., Ahn, K., Park, S. Y., Hong, J., Kim, H., Yoon, K. J., Son, J. W., Lee, H. W., & Lee, J. H. (2014). Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia. Solid State Ionics, 263, 103-109. https://doi.org/10.1016/j.ssi.2014.05.013